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Sun, 19 Jun 2022 08:50:43 -0700 (PDT) From: Yafang Shao To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, quentin@isovalent.com, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeelb@google.com, songmuchun@bytedance.com, akpm@linux-foundation.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, vbabka@suse.cz Cc: linux-mm@kvack.org, bpf@vger.kernel.org, Yafang Shao Subject: [RFC PATCH bpf-next 01/10] mm, memcg: Add a new helper memcg_should_recharge() Date: Sun, 19 Jun 2022 15:50:23 +0000 Message-Id: <20220619155032.32515-2-laoar.shao@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220619155032.32515-1-laoar.shao@gmail.com> References: <20220619155032.32515-1-laoar.shao@gmail.com> MIME-Version: 1.0 ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b="gL00DEY/"; 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dkim=pass header.d=gmail.com header.s=20210112 header.b="gL00DEY/"; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf29.hostedemail.com: domain of laoar.shao@gmail.com designates 209.85.216.42 as permitted sender) smtp.mailfrom=laoar.shao@gmail.com X-Rspamd-Server: rspam10 X-HE-Tag: 1655653845-484493 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Currently we only recharge pages from an offline memcg or reparented memcg. In the future we may explicitly introduce a need_recharge state for the memcg which should be recharged. Signed-off-by: Yafang Shao --- include/linux/memcontrol.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 9ecead1042b9..cf074156c6ac 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1755,6 +1755,18 @@ static inline void count_objcg_event(struct obj_cgroup *objcg, rcu_read_unlock(); } +static inline bool memcg_need_recharge(struct mem_cgroup *memcg) +{ + if (!memcg || memcg == root_mem_cgroup) + return false; + /* + * Currently we only recharge pages from an offline memcg, + * in the future we may explicitly introduce a need_recharge + * state for the memcg which should be recharged. + */ + return memcg->kmemcg_id == memcg->id.id ? false : true; +} + #else static inline bool mem_cgroup_kmem_disabled(void) { @@ -1806,6 +1818,11 @@ static inline void count_objcg_event(struct obj_cgroup *objcg, { } +static inline bool memcg_need_recharge(struct mem_cgroup *memcg) +{ + return false; +} + #endif /* CONFIG_MEMCG_KMEM */ #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP)